Having been structurally altered as a result of, or resulting from, exposure to intense heat and/or pressure (at the contact zone between colliding plates, for example).
The compaction and cementation of sediment into rock.
a line, either on a map or the surface of the Earth, joining points at which metamorphism reached similar pressures and temperatures; actually the intersection of a surface and that of the Earth
A common and widely-distributed metamorphic rock having bands or veins.
A rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.
The result of having been being worn away or eroded, as by a glacier on rock or the sea on a cliff face
any organic matter present in a sedimentary rock that is insoluble in organic solvents; the precursor of oil and natural gas
any rock that has undergone modifications due to dynamic recrystallization following plastic flow
Any crystalline rock having a foliated structure and hence admitting of ready division into slabs or slates.
Having been structurally altered as a result of, or resulting from, exposure to intense heat and/or pressure (at the contact zone between colliding plates, for example).
a line, either on a map or the surface of the Earth, joining points at which metamorphism reached similar pressures and temperatures; actually the intersection of a surface and that of the Earth